* {
  padding: 0;
  margin: 0;
}
body{
  background-image: url(https://pic3.zhimg.com/v2-93da1b041f05ec3784f7a2b42af00bb3_r.jpg?source=1940ef5c);


}
#top {
  height: 161px;
  width: 1200px;
  margin: 0 auto;
}

#top .logo img {
  margin-top: 41px;
  width: 217px;
  height: 77px;
  cursor: pointer;
}


.box {
  height: 500px;
  width: 400px;
  margin: 50px auto;
}

.box h1 {
  text-align: center;
}

.box>div input {
  width: 400px;
  height: 50px;
  margin-top: 40px;
  border-radius: 10px;
  border: 1px solid black;
}

.box>div button {
  margin-top: 40px;
  width: 400px;
  height: 50px;
  background-color: skyblue;
  border: none;
}

.ts {
  display: none;
}

.mmts {
  display: none;
}

.active {
  display: block;
  color: red;
}